NOGALES, AZ - JUNE 02: An U.S. Customs and Border Protection bike patrol agent apprehends an undocumented immigrant after he was spotted entering the country illegally June 2, 2010 in Nogales, Arizona. He was captured in the back yard of a home about one block from the border fence. During the 2009 fiscal year 540,865 undocumented immigrants were apprehended entering the United States illegally along the Mexican border, 241,000 of those were captured in the 262 mile stretch of the border known as the Tucson Sector. (Photo by Scott Olson/Getty Images)
(2010 Getty Images)

PALMVIEW, Texas (AP) – U.S. Border Patrol agents say they found 31 immigrants who entered the U.S. illegally hiding in a single apartment in a small town on the Texas-Mexico border.

The Border Patrol said Wednesday that those arrested included immigrants from Mexico, El Salvador, Honduras and Guatemala. Agents also arrested a Mexican woman they say was the caretaker of the apartment.

Also Wednesday, the Border Patrol said 10 undocumented immigrants were hidden behind a fake wall inside a commercial truck at a checkpoint in Falfurrias, about 90 miles north of the border. Agents arrested the driver, who was not identified.

Border crossings of children and family members in particular have spiked in recent months. Experts blame gang violence in Central America for driving citizens north at numbers that are approaching last summer's surge.